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fuel level gauge and pod
The most traditional method for measuring the liquid level of automotive fuel tanks is the float method. This method is mainly achieved by the fact that the float will decrease as the amount of fuel in the pod decreases and the liquid level will decrease the principle of reduction is used to measure. The specific measurement method is that as the amount of oil in the tank increases or decreases, the float will change with the change of liquid level. As the float changes, the electrical components driven by the float also change. When the fuel in the tank is about to run out, the liquid level in the tank will become very high. Less, so the float in the fuel tank will also decrease with the liquid level, which will drive the resistance on the float, and at this time, the negative resistance value will become large. Stay when the circuit becomes large, the current will become very small and the pointer will point to the side with low oil volume. When refueling in the fuel tank, as the fuel volume increases plus, the liquid level will gradually increase, and as the liquid level increases, the float will also increase and the electric negative value will decrease. In this case, the current will increase and the pointer will also point to the side with more oil.
Another traditional method for measuring the liquid level of automotive fuel tanks is to use magnetic materials for measurement, which is to use Hall elements for measurement. The specific principle is to use oil when the amount of fuel in the tank increases or decreases, the float will change with the change in liquid level, which will also drive the linear Hall element on the float to change transformation. When the liquid level in the pod becomes low, the float will decrease as the liquid level decreases.
At this time, the magnet on the float connecting rod will not be affected on a horizontal plane, at this time, the magnetic flux between the linear output Hall element and the magnet will increase, causing a change in the voltage divider cathode make the pointer of the Fuel gauge point to the side with less fuel. When fuel is injected into the pod, the liquid level inside the pod will gradually rise, so the float will also follow as the liquid level increases, it becomes higher. At this time, the float will move to a horizontal plane with the connecting rod, and at this time, the linear output Hall element will the magnetic flux between the magnets will decrease, which will cause the change of the partial voltage cathode. At this time, the pointer of the Fuel gauge will point to the high oil volume.
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